Installation guide

AT-S62 Version 1.4.0 Software Release Notes
PN: 613-000490 Rev. A 5 Allied Telesyn, Inc.
Known Issues
 Combo ports on the AT-8550GB and AT-8550SP switches. The redundancy function of the
combo ports on RoHS-compliant versions of the AT-8550GB and AT-8550SP switches may
not function as described in the AT-8500 Installation Guide under some conditions. When the
combo ports are connected to other combo ports on a similar switch, the redundancy function
performs as described in the documentation. Priority is given to a link on a fiber optic port on
an SFP or GBIC module over a link on a redundant twisted pair port (ports 49R and 50R).
However, when a combo twisted pair port is connected to a regular port (i.e., not a combo
port) on another device, priority is given to that port rather than the fiber optic port. In the lat-
ter scenario, a fiber optic port on an SFP or GBIC module will only establish a link to a remote
node when its paired twisted pair port is not connected or has not established a link. (4056)
 atiStkSwSysAction MIB object. Starting with version 1.4.0, changes made with SNMP to the
operating parameters of a switch are no longer automatically saved to the active boot config-
uration file on the device. Rather, they must be saved with the saveConfig option in the atiStk-
SwSysAction MIB object. However, the saveConfig option is nonfunctional in this release and
selecting it may cause the SNMP client on the unit to stop responding to SNMP commands.
To avoid this issue, use one of the other management interfaces (i.e., menus, command line,
or web browser) to save your changes to the switch’s configuration file when you are finished
managing a unit with SNMP. The other options of the atiStkSwSysAction MIB object, reset
and defaultConfig, are functional. (4067)
 802.1x authenticator port parameters. Changing all of the parameters of an 802.1x authenti-
cator port from the default values may cause the switch to insert an invalid command in the
active boot configuration file. The MAXREQ parameter is assigned an invalid value. (3955)
Operational Notes
 AT-S62 version 1.2.1 or earlier upgrade. Note the following if you are upgrading a switch from
version 1.2.1 or earlier to version 1.4.0:
- You cannot upgrade directly from version 1.2.1 or earlier to version 1.4.0. You must first
upgrade the switch to version 1.3.0 and then to version 1.4.0.
- If the DHCP/BOOTP client software is active and the unit is obtaining its IP configuration
from a BOOTP server, you must activate the BOOTP client software on the unit after the
upgrade is complete. This does not apply if the switch is using a DHCP server.
 Gigabit Ethernet fiber optic ports. Disconnecting the Rx fiber strand from an optional Gigabit
Ethernet fiber optic port without also simultaneously disconnecting the Tx strand while there
is traffic on the cable may cause the port to fail. Reactivating the port may require removing
and reinserting the GBIC module or rebooting the system. To avoid this problem, always dis-
connect both Rx and Tx strands simultaneously when disconnecting a fiber optic cable from a
Gigabit Ethernet fiber optic port. (2088)
 Power over Ethernet. A powered device connected to an AT-8524POE switch can draw 10%
above the specified maximum amount of power on a port, up to the maximum 15.4W. For
example, a setting of 10W for a port’s maximum power allows a powered device to draw up to
11W. (2250)
 Quality of Service. The ingress and egress ports of a Quality of Service policy on an
AT-8550GB or AT-8550SP switch must be from either of the following two groups. A QoS pol-
icy cannot contain ports from both groups: (2346)
- Group 1: Ports 1 to 24 and 49